/**
 * 增强样式表 - Enhanced Styles
 * 版本：1.0.0
 * 用于改善用户体验和视觉效果
 */

/* ==================== 全局增强 ==================== */

:root {
    /* 新增颜色变量 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-warning: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-info: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

    /* 阴影层级 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.10);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);

    /* 动画时长 */
    --transition-fast: 0.15s;
    --transition-base: 0.3s;
    --transition-slow: 0.5s;

    /* 新增间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* ==================== 高级计算器样式 ==================== */

.advanced-calculator {
    background: var(--card-bg);
    border-radius: 16px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid var(--border-color);
}

.advanced-calculator:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.calc-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary-color);
}

.calc-header h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.calc-header h3 i {
    font-size: 1.8rem;
}

.calc-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.calc-body {
    display: grid;
    gap: var(--spacing-md);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

.input-group input,
.input-group select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--bg-color);
    color: var(--text-color);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(103, 58, 183, 0.1);
}

.input-group small {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

.calc-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.calc-btn:active {
    transform: translateY(0);
}

.calc-btn i {
    font-size: 1.2rem;
}

/* ==================== 计算结果样式 ==================== */

.calc-result {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(103, 58, 183, 0.05) 0%, rgba(103, 58, 183, 0.02) 100%);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.calc-result h4 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.result-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.result-label {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.result-value {
    font-weight: 700;
    color: var(--text-color);
    font-size: 1.1rem;
}

.result-value.highlight {
    color: var(--primary-color);
    font-size: 1.3rem;
}

.result-value.safe {
    color: var(--success-color);
}

.result-value.warning {
    color: var(--warning-color);
}

.result-notes {
    background: rgba(255, 193, 7, 0.1);
    padding: var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid var(--warning-color);
    margin-top: var(--spacing-md);
}

.result-notes strong {
    color: var(--warning-color);
}

.result-notes ul {
    margin-top: var(--spacing-sm);
    padding-left: var(--spacing-lg);
}

.result-notes li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}

/* ==================== 增强内容框样式 ==================== */

.formula-box {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.05) 0%, rgba(33, 150, 243, 0.02) 100%);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--info-color);
    box-shadow: var(--shadow-sm);
}

.formula-box h4 {
    color: var(--info-color);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.concept-box {
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.05) 0%, rgba(156, 39, 176, 0.02) 100%);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.concept-box h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.example-box {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.05) 0%, rgba(76, 175, 80, 0.02) 100%);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--success-color);
    box-shadow: var(--shadow-sm);
}

.example-box h4 {
    color: var(--success-color);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.warning-box {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.05) 0%, rgba(244, 67, 54, 0.02) 100%);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--danger-color);
    box-shadow: var(--shadow-sm);
}

.warning-box h4 {
    color: var(--danger-color);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.info-box {
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.05) 0%, rgba(0, 188, 212, 0.02) 100%);
    padding: var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid #00bcd4;
    margin: var(--spacing-md) 0;
}

/* ==================== 增强表格样式 ==================== */

.reference-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-md) 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.reference-table th {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
}

.reference-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
}

.reference-table tr:last-child td {
    border-bottom: none;
}

.reference-table tr:hover td {
    background: rgba(103, 58, 183, 0.05);
}

/* ==================== 进度指示器 ==================== */

.progress-indicator {
    position: relative;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    transition: width var(--transition-slow);
    animation: progressShimmer 2s infinite;
}

@keyframes progressShimmer {
    0% { background-position: -100% 0; }
    100% { background-position: 200% 0; }
}

/* ==================== 工具提示 ==================== */

.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: 0.85rem;
    border-radius: 6px;
    white-space: nowrap;
    z-index: 1000;
    animation: tooltipFadeIn var(--transition-fast);
}

.tooltip:hover::before {
    content: '';
    position: absolute;
    bottom: 115%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ==================== 徽章 ==================== */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--primary-color);
    color: white;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

.badge-warning {
    background: var(--warning-color);
    color: white;
}

.badge-danger {
    background: var(--danger-color);
    color: white;
}

.badge-info {
    background: var(--info-color);
    color: white;
}

/* ==================== 卡片悬浮效果增强 ==================== */

.card-hover {
    transition: all var(--transition-base);
    cursor: pointer;
}

.card-hover:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* ==================== 按钮变体 ==================== */

.btn-gradient {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-color);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* ==================== 加载动画 ==================== */

.loading-spinner {
    border: 3px solid rgba(103, 58, 183, 0.1);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-lg) auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== 脉冲动画 ==================== */

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* ==================== 渐变文本 ==================== */

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* ==================== 玻璃态效果 ==================== */

.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .glass-card {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ==================== 响应式增强 ==================== */

@media (max-width: 768px) {
    .advanced-calculator {
        padding: var(--spacing-md);
    }

    .result-grid {
        grid-template-columns: 1fr;
    }

    .calc-btn {
        width: 100%;
    }

    .reference-table {
        font-size: 0.85rem;
    }

    .reference-table th,
    .reference-table td {
        padding: var(--spacing-sm);
    }
}

/* ==================== 深色模式适配 ==================== */

[data-theme="dark"] {
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.6);
}

[data-theme="dark"] .advanced-calculator {
    background: rgba(30, 30, 30, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .input-group input,
[data-theme="dark"] .input-group select {
    background: rgba(50, 50, 50, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

[data-theme="dark"] .calc-result {
    background: rgba(103, 58, 183, 0.1);
}

[data-theme="dark"] .result-item {
    background: rgba(40, 40, 40, 0.8);
    border-color: rgba(255, 255, 255, 0.05);
}

/* ==================== 打印样式增强 ==================== */

@media print {
    .advanced-calculator {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }

    .calc-btn {
        display: none;
    }

    .result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==================== 可访问性增强 ==================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 焦点指示器 */
*:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* ==================== 动画性能优化 ==================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== 滚动条美化 ==================== */

.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: var(--border-color);
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ==================== 高速接口深度内容样式 (v2.5.2) ==================== */

.high-speed-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.hs-nav-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 2px solid transparent;
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.hs-nav-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 0;
}

.hs-nav-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.3);
    border-color: #667eea;
}

.hs-nav-card:hover::before {
    opacity: 0.08;
}

.hs-nav-card > * {
    position: relative;
    z-index: 1;
}

.hs-card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 28px;
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.hs-nav-card h4 {
    color: var(--text-color);
    margin: 0.5rem 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.hs-nav-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0.5rem 0 1rem 0;
    line-height: 1.5;
}

.hs-badge {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.high-speed-content-area {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    min-height: 400px;
}

.content-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--text-secondary);
}

.content-placeholder i {
    font-size: 48px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.deep-dive-container {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 深度内容区块样式 */
.section-block {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(102, 126, 234, 0.03);
    border-left: 4px solid #667eea;
    border-radius: 8px;
}

.concept-box {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.dark-mode .concept-box {
    background: #2a2a2a;
}

.formula-box {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    border-left: 4px solid #667eea;
}

.dark-mode .formula-box {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
}

.example-box {
    background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    border-left: 4px solid #00bcd4;
}

.dark-mode .example-box {
    background: linear-gradient(135deg, #1a3a40 0%, #2d5a66 100%);
}

.warning-box {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    border-left: 4px solid #ff9800;
}

.dark-mode .warning-box {
    background: linear-gradient(135deg, #3d2e1f 0%, #5a4730 100%);
}

.reference-box {
    background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
    border-left: 4px solid #9c27b0;
}

.dark-mode .reference-box {
    background: linear-gradient(135deg, #2d1b33 0%, #3e2548 100%);
}

.reference-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.dark-mode .reference-table {
    background: #2a2a2a;
}

.reference-table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.reference-table th,
.reference-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.reference-table tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

/* 专家级难度标签 */
.difficulty.expert {
    background: linear-gradient(135deg, #e91e63 0%, #9c27b0 100%);
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .high-speed-nav-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hs-nav-card {
        padding: 1rem;
    }

    .hs-card-icon {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }

    .high-speed-content-area {
        padding: 1rem;
    }
}